SCR Rain or Leak Alarm (CB22097E)

This sensitive circuit was found in old documentation. The SCR can be any of the 106 series and the transistor a BC548.

CMOS Crystal Oscillator and Divider (CB16000E)
The circuit presented is a 10 MHz oscillator with crystal, which already has several splitters for...
Wein bridge oscillator (CB21680E)
This Wein bridge oscillator as it is also known uses a 741 with symmetrical power. With the...
Metronome (CB15081E)
This traditional metronome configuration uses unusual transistors in the original version, but it...